Soak a cotton pad in apple cider vinegar and place it on the itching area. If the area is raw; be prepared for a temporary burning sensation. Leave the soaked cotton pad on overnight. (You can keep it in place with a sanitary napkin.) You should have instant relief. If itching starts again during the day, repeat the procedure-instead of scratching.
Before bedtime, take a shower, then pat dry the itchy area and apply wheat germ oil. To avoid messy bedclothes and sheets, put a sanitary napkin over the oily area.
For years, pumpkin seeds have been used as a folk treatment to control and prevent intestinal parasites (which may result in an itchy bottom). Buy the shelled and unsalted seeds, and eat a handful daily.